Means for protecting concrete or other structures from fire.



E. V. JOHNSON.V KEANE FOB PBOTBUTING CONCRETE 0B. OTHER STRUCTURES FROM PIRE.

APPLICATION FILED TBB. 11, 1907.

Patented Jan. 17, 1911.

2 BHEETB-SHEET l.

V E. v. JOHNSON. m8 FOB PBOTEGTIIG CONCRETE 0B OTHER STRUCTURES FROM PIRE.

APPLIQATIOI FILED TBB. 11, 1907.

Patented Jan. 17,1911.

I SHEETS-SHEET 2.

UNiTED s'rA'rEs PirENT oFFioE.

` i ERNEST V. JOHNSON, OF CHICAGQ, ILLINOIS."

msnm ron rar merma concurre on orner. sumaron-Es rnom rma.

Specification of Letters Patent.

Patented Jan. 17, 1911.

Application Med February 11, 1997. Serial 210.356,675.

'To all whom 'it may concern:

Be it known that. I, EnNEsrV. Joiixsos, u citizen of the United States, residing at Chica o, county of Cook, and State of Illijected to the temperature ordinarily attained renewed 'when desired.

in al burning building, are materially de-A teriorated and in fa -often damaged beyondy usefulness, It is .also known that where freproofing slabs or facings are placed on such structures, thesame are broken in the wreckage and henco'havo to be renewed.

My inventionhas forits primary object, therefore, t-ov provide improved, and 4simple means whereby the protecting facing -or slabs maybe readily lattached tothe structure and -With a view to the attainment of these ends and 'the accom lishmentof certain other objects, which 'wil hereinafter alp ar, the invention consistst in. the features' 'novelty which will' be now 'described with :reference '.to they accompanying drawings and more particularly ointed out in the claims. l

In the sai drawings 'Figure 1 is a vertical'sectional view of a part of-a floor and a concrete beam depending from the ceiling below. 5' Fi 2 is a face viewroi`v the ceiling or under'si e thereof. Fig. 3 is a detail perspective view of one of the attaching anc orsi. 'F ig. 4 isa horizontal sectional view of a circular' column provided with this in# vention. Fi`

column.

1 represents 'the concreteor other plastic materialof which the structure is composed,

and 2 arethe slabs or. facings which'are placed against the surface thereof liable to b e e-p'osedto. the `fire, forA protecting the concrete., It is,'of course, apparent that the 'particular form of the structure to .which 'these' slabs are applied. v'is entirely imma teri'railAv so far as this invention is concerned. However, inthe drawings various adaptational are illustrated, Fig. l being a portion'.

I, of a floor with a depending bellm' formation .commonly employed in concrete-'structures andin Fig". 4 is shown the slabs curved in g. 5 is a similar view ,of a squarefaces, however, are formed with grooves or sockets 3, whichA are preferably arranged in paralleblines. These sockets may be of dove. tailed shape in cross-section, 'if desired, so

that a part of the concrete will en age there' in and thereby assist in holding t e slabs in place but their prime purpose is to receive `and hold the outer flooring ends or heads of anchors whichv are embedded- .in the concrete whilethe latter is lastie or, soft. A.

multiplicityr "of these anc ors are used and so disposed that a plurality of them Will'engage with'each of the'slabs'an'd preferably a plurality in each groove of each slab. The preferable for'm of such anchor is-sh'own in Fig. 3 and'is seen t9 consist of a'stripfbent at its intermediate Apoi-tion to forma dove,

tailed or 'angular head 4, withits extremitiesv crossed and preferably crimped, as shown at 5, whereby they will be more se'- curely rooted in the concrete.

ends or crimped ortions' of the crossed extremities are pre erably brought vback more nearly into'parallel soas to'better facilitate their introduction into the concrete without causing them to spread unduly. The structure .thus equipped with these anchors is capable of'thaving `the.protect.ing slabs or facing blocks '2, readily sup orted vthereon and when the blocks become amagcd audit is desired to replace them, the 'old ones may be removed by sliding-them longitudinally iii-their grooves or by: breaking them ofi, ,and nev ones substituted by slipping thein into place withtheir grooves engaging over the remaining anchors on the structure.

In Aorder that the' invention may beunderstood by those skilled inthe art, the details of these exampleshave been thus specifically described, but l l lVh'a-t I claim as new therein and desire to, secure by Letters Patent isy 1. The combination with a plastic mate-M.

rial structure, of a meansfor engaging' a facing' provided with sockets-embodying a.' plurality of anchorslhaving their endseinf.. bedded in' said structureandfiattenedptgr:.f

-t ions intermedia te the ends bent to form outwardly enlarged projections .for engaging `ille :walls of said sockets. g;

ln means for holding a facin `u`on a structure o1" the character descri. the

combination with a concrete structure,4 of a A scribed, the combination with a concrete bodyi'ng an anchor composed of a flat stri j V'structure of the character described, einstrncturc. of a recessedfacing, of an anchor 'composed of a strip liavincori'ugated' extremities, said extremities eing embedded m tlie'structure and having its intermediate -portion projecting from said structure and adapted to engage lthe lateral walls'ofthe recess in said facing.

4. The combination with aj'plastic struc. ture, off a means for holding a slab uponthe with its extremities fcrrugated and adapte structure of the character described em Sheet metal to-be embedded in the plastic-structure and its intermediate portion .bent to form anv 30 outajardly enlarged projection adapted to engage 1n a i'elcessin n slab tol be retained.

5. A means for holding a facing'u on a.

dying an anchorci'posed of strip with its extremities crossed and spaced in substantially-parallel lines andgdapted to be embedded in the structure and its intermediatevportion bent vto form a'p'rjection for engaging a recess in a slab to be mounted/40 on said structure.

6. A means forlioldnga facing upon a structure of` the character described,'em bodyingan anchorlgnmpo'sed of astrin with spaced lin substantia lyparallel lines,'said extremities being adapte -.t' o be embeddedl'in .the 'structure andfjts intermediatepart flat and being 'adapted tooengagevinA/recess of a slab to be retained.

Inf testimony 1whereof-Ihave signed my naine to this specificatiQmuin the presence of twogsubscribing witnesses on .th is 2nd day of February A. 11190 .i

its 'extremities corrugated and crossed. and 45 

